:root {
  --bg-dark: #0a0e17;
  --card-bg: rgba(17, 22, 34, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --text-primary: #e8ecf4;
  --text-secondary: #8b93a7;
  --accent: #3ec5ff;
  --accent-dim: #1e7ba8;
  --danger: #ff6b7a;
  --mono: "SF Mono", "Cascadia Code", "Consolas", "Menlo", monospace;
  --sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--sans);
  color: var(--text-primary);
  background-color: var(--bg-dark);
  background-image: url("background.jpg");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
}

.bg-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 9, 16, 0.78);
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(6px);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent), #8be9ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0 0 28px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.generate-row,
.search-form {
  display: flex;
  gap: 8px;
}

.generate-row input,
.search-form input {
  flex: 1;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  font-family: var(--mono);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.generate-row input:focus,
.search-form input:focus {
  border-color: var(--accent-dim);
}

.generate-row button,
.search-form button {
  padding: 12px 20px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #04121c;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: filter 0.15s ease;
  white-space: nowrap;
}

.generate-row button:hover,
.search-form button:hover {
  filter: brightness(1.1);
}

.generate-row button:disabled {
  opacity: 0.6;
  cursor: default;
}

.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 20px 0;
}

.error-msg {
  margin: 16px 0 0;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(255, 107, 122, 0.1);
  border: 1px solid rgba(255, 107, 122, 0.25);
  color: var(--danger);
  font-size: 0.85rem;
}

.result {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.result-header .label {
  font-weight: 600;
  font-size: 1.05rem;
}

.code-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  padding: 3px 8px;
  border-radius: 6px;
}

.ping-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--border-subtle);
  margin-bottom: 16px;
}

.ping-caption {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.ping-row {
  display: flex;
  gap: 8px;
}

.ping-row input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.copy-btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent-dim);
  background: transparent;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.copy-btn:hover {
  background: rgba(62, 197, 255, 0.1);
}

.ip-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border-radius: 10px;
  background: rgba(62, 197, 255, 0.06);
  border: 1px solid rgba(62, 197, 255, 0.15);
  margin-bottom: 20px;
}

.ip-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.refresh-link {
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
}

.refresh-link:hover {
  text-decoration: underline;
}

.ip-caption {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.ip-value {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
}

.ip-date {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.ip-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.ip-meta-item {
  font-size: 0.76rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.table-wrap {
  overflow-x: auto;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.ua-cell {
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
  font-size: 0.76rem;
}

.history-table th {
  text-align: left;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.history-table td {
  padding: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.history-table td.mono {
  font-family: var(--mono);
  color: var(--accent);
}

.no-history {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

@media (max-width: 520px) {
  .card {
    padding: 28px 20px;
  }

  .generate-row,
  .search-form,
  .ping-row {
    flex-direction: column;
  }
}